Write a Matlab function to determine the roots of a quadratic equation $a{x}^2+bx+c.$ Compare

your answers with those obtained through the built$-$in Matlab function for the following cases:

a$.a=1,b=6,c=2$

b$.a=0,b=-4,c=1\mathrm{.}6$

c$.,a=3,b=2\mathrm{.}5,c=7$